8.5-ounce FR Quick Duck: 88% cotton/12% nylon - Rain Defender durable water repellent - 55% modacrylic 30% aramid 15% polyester insulation - High back with FR elastic suspenders and FR side-release buckles - Bib pocket with zipper closure - Chap-style double-front enhances durability - Brass zipper fly with Nomex FR zipper tape - FR melamine buttons at waist - Articulated knee enhances ease of movement - Multiple tool and utility pockets - Brass leg zippers with Nomex FR zipper tape and protective flaps with arc-resistant snap closures - Carhartt FR and NFPA 2112 labels sewn on front pocket - Meets the performance requirements of NFPA 70E and is UL Classified to NFPA 2112